From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Thu, 22 Jan 2026 17:29:57 +0000 (+0100)
Subject: [3.13] gh-142779: Initialize reserved field for proper padding (GH-142780) (#144160)
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e4e36a716a779887d5b8d2411810a2bec60c4df2;p=thirdparty%2FPython%2Fcpython.git

[3.13] gh-142779: Initialize reserved field for proper padding (GH-142780) (#144160)

gh-142779: Initialize reserved field for proper padding (GH-142780)

The jitdump specification specifies a reserved field for padding.

Initialize it so no garbage data is embedded in the jitdump files.
(cherry picked from commit 77bf4ba732a8736910bd6b7ec5a58b8ee833c95f)

Co-authored-by: stratakis <cstratak@redhat.com>
---

diff --git a/Python/perf_jit_trampoline.c b/Python/perf_jit_trampoline.c
index a44a74f58df8..3a63dd73bc47 100644
--- a/Python/perf_jit_trampoline.c
+++ b/Python/perf_jit_trampoline.c
@@ -372,6 +372,7 @@ static void perf_map_jit_write_header(int pid, FILE* out_file) {
     header.version = 1;                           // Current jitdump version
     header.size = sizeof(Header);                 // Header size for validation
     header.elf_mach_target = GetElfMachineArchitecture();  // Target architecture
+    header.reserved = 0;                          // padding reserved for future use
     header.process_id = pid;                      // Process identifier
     header.time_stamp = get_current_time_microseconds();   // Creation time
     header.flags = 0;                             // No special flags currently used